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CXUS51 KGYX 051216
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TTAA00 KGYX 041002
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
716 AM EST TUE DEC 5 2017
...................................
...THE PORTLAND ME CLIMATE SUMMARY FOR THE FALL SEASON, FROM
9/1/2017 TO 11/30/2017...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2017
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 95 09/11/1983
09/07/1945
LOW 3 11/24/1989
HIGHEST 86 09/24 86 0 91 09/09
LOWEST 17 11/28 16 1 23 11/29
11/11
AVG. MAXIMUM 62.8 58.9 3.9 61.5
AVG. MINIMUM 43.2 40.0 3.2 42.3
MEAN 53.0 49.4 3.6 51.9
DAYS MAX >= 90 0 0.3 -0.3 1
DAYS MAX <= 32 0 1.0 -1.0 0
DAYS MIN <= 32 23 26.1 -3.1 21
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 24.18 2005
MINIMUM 4.88 1915
TOTALS 9.47 13.49 -4.02 13.28
DAILY AVG. 0.10 0.15 -0.05 0.15
DAYS >= .01 24 30.9 -6.9 30
DAYS >= .10 14 19.4 -5.4 18
DAYS >= .50 8 8.1 -0.1 6
DAYS >= 1.00 2 3.6 -1.6 4
GREATEST
24 HR. TOTAL 1.76 10/26
SNOWFALL (INCHES)
RECORDS
TOTAL 24.3 1921
TOTALS 0.1 1.9 -1.8 0.5
SINCE 7/1 0.1 1.9 -1.8 0.5
SNOWDEPTH AVG. 0
DAYS >= TRACE 2 1.5 0.5 3
DAYS >= 1.0 0 0.7 -0.7 0
GREATEST
SNOW DEPTH T 11/14
24 HR TOTAL 0.1 11/13
DEGREE_DAYS
HEATING TOTAL 1132 1446 -314 1238
SINCE 7/1 1165 1491 -326 1252
COOLING TOTAL 69 31 38 68
SINCE 1/1 433 359 74 553
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 7.5
HIGHEST WIND SPEED/DIRECTION 48/130 DATE 10/30
HIGHEST GUST SPEED/DIRECTION 69/130 DATE 10/30
SKY COVER
AVERAGE SKY COVER 0.50
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 HEAVY RAIN 8
RAIN 16 LIGHT RAIN 30
FREEZING RAIN 0 LT FREEZING RAIN 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 FOG 35
FOG W/VIS <= 1/4 MILE 9 HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
AFTER A RELATIVELY COOL AUGUST, THE COOL FALL-LIKE WEATHER CONTINUED
INTO THE FIRST FEW DAYS OF SEPTEMBER. AFTER A FEW DAYS OF RAIN,
INCLUDING NEARLY AN INCH ON SEPTEMBER 3, A NEW WEATHER PATTERN BEGAN
TO EMERGE. A RIDGE OF HIGH PRESSURE OVER THE WESTERN ATLANTIC AND
THE EAST COAST BROUGHT RELATIVELY WARM AIR NORTHWARD INTO NEW
ENGLAND. ALTHOUGH A FEW COLD FRONTS MANAGED TO SNEAK INTO THE AREA
BRINGING BRIEFLY COOLER WEATHER, THE OVERALL TREND OF WARMER THAN
NORMAL TEMPERATURES CONTINUED FOR SEVERAL WEEKS. THE WARMEST PERIOD
WAS IN LATE SEPTEMBER WHEN PORTLAND SAW 5 STRAIGHT DAYS WITH
TEMPERATURES IN THE 80S FROM SEPTEMBER 23 THRU 27. THE PERSISTENT
WARMTH CONTINUED DEEP INTO OCTOBER, BRINGING PORTLAND ITS SECOND
WARMEST SEPTEMBER AND WARMEST OCTOBER ON RECORD. AFTER A MOSTLY DRY
FIRST HALF OF FALL, A SERIES OF LOW PRESSURE SYSTEMS MOVED THROUGH
NEW ENGLAND LATE IN OCTOBER. MORE THAN 3 INCHES OF RAIN FELL ON
OCTOBER 25 AND 26. ANOTHER LOW PRESSURE SYSTEM BROUGHT ANOTHER INCH
OF RAIN AND STRONG WINDS GUSTING TO 69 MPH ON THE NIGHT OF OCTOBER
29 INTO THE MORNING OF THE 30TH. THE STRONG WINDS BROUGHT
SIGNIFICANT WIND DAMAGE TO THE REGION. THIS PERIOD OF STORMY WEATHER
SIGNALED A COMING CHANGE IN THE WEATHER PATTERN AS THE PERSISTENT
WARMTH FINALLY BEGAN TO BREAK DOWN. PORTLAND FINALLY SAW ITS FIRST
FREEZE ON NOVEMBER 1, ONLY THE SECOND TIME ON RECORD THAT THE FIRST
FREEZE DID NOT ARRIVE UNTIL THE MONTH OF NOVEMBER. AFTER ANOTHER
BRIEF PERIOD OF WARMTH, A COLD FRONT ON NOVEMBER 6 BROUGHT COLD AIR
INTO THE REGION. EVEN COLDER AIR POURED IN STRAIGHT OUT OF THE
ARCTIC A FEW DAYS LATER WITH PORTLAND FALLING ALL THE WAY TO 17
DEGREES ON NOVEMBER 11. THE FIRST MEASURABLE SNOW OF THE SEASON
OCCURRED A FEW DAYS LATER WHEN 0.1 INCHES FELL ON NOVEMBER 13. COLD
WEATHER CONTINUED THROUGH MUCH OF NOVEMBER WITH ONLY BRIEF
EXCEPTIONS AS A SERIES OF COLD FRONTS KEPT BRINGING MORE COLD AIR IN
DURING THE MONTH. ALTHOUGH THE FALL ENDED COLDER THAN NORMAL, THE
VERY WARM START TO THE SEASON ENSURED PORTLAND WOULD FINISH TIED AS
THE WARMEST FALL ON RECORD.
THE AVERAGE TEMPERATURE FOR THE FALL WAS 53.0 DEGREES WHICH WAS 3.6
DEGREES ABOVE NORMAL AND TIED FOR THE WARMEST FALL ON RECORD. THE
AVERAGE TEMPERATURE WAS ALSO 53.0 DEGREES IN 2011. THE COOLEST FALL
WAS IN 1976 WHEN THE AVERAGE TEMPERATURE WAS 45.6 DEGREES. THE
FOLLOWING TABLE LISTS THE WARMEST FALL SEASONS ON RECORD AT PORTLAND.
WARMEST AVERAGE TEMPERATURE IN FALL (SINCE 1940)...
RANK TEMP YEAR
1 53.0 2017 <===
53.0 2011
3 52.3 2015
4 51.9 2016
5 51.5 2005
51.5 1961
7 51.3 1990
51.3 1970
9 51.2 2014
10 51.0 2007
51.0 2006
THE FIRST FREEZE OF THE SEASON OCCURRED ON NOVEMBER 1, ABOUT 3 WEEKS
LATER THAN NORMAL. THIS WAS ONLY THE SECOND TIME THAT PORTLAND MADE
IT THROUGH THE MONTH OF OCTOBER WITHOUT SEEING A FREEZE. THE
FOLLOWING TABLE LISTS THE LATEST DATES OF THE FIRST FALL FREEZE AT
PORTLAND.
LATEST DATE OF FIRST FALL FREEZE (SINCE 1940)...
RANK DATE YEAR
1 NOV 3 2014
2 NOV 1 2017 <===
3 OCT 25 2013
OCT 25 1949
5 OCT 21 2005
OCT 21 1990
OCT 21 1985
8 OCT 19 1970
9 OCT 18 2008
10 OCT 17 2015
A TOTAL OF 9.47 INCHES OF PRECIPITATION FELL WHICH WAS 4.02 INCHES
BELOW NORMAL AND THE SECOND DRIEST FALL IN THE LAST 16 YEARS. ALMOST
HALF OF THE RAIN THAT FELL THIS FALL FELL DURING THE LAST WEEK OF
OCTOBER WHEN MORE THAN 4.5 INCHES OF RAIN WAS MEASURED, INCLUDING
3.14 INCHES ON OCTOBER 25 AND 26. THE DRIEST FALL ON RECORD WAS IN
1915 WHEN ONLY 4.88 INCHES OF PRECIPITATION WAS RECORDED. THE
WETTEST WAS IN 2005 WHEN 24.18 INCHES FELL.
ONLY 0.1 INCHES OF SNOW FELL WHICH WAS 1.8 INCHES BELOW NORMAL. FALL
SNOWFALL CAN BE QUITE VARIABLE, WITH MEASURABLE SNOWFALL OBSERVED
ABOUT 75 PERCENT OF THE TIME. THE SNOWIEST FALL WAS IN 1921 WHEN
24.3 INCHES WAS MEASURED. NO SNOW FELL IN FALL IN 4 SEPARATE YEARS,
MOST RECENTLY IN 2006. ONLY A TRACE FELL IN 30 SEPARATE YEARS, MOST
RECENTLY IN 2015.
THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2017...
DATE RECORD PREVIOUS
SEP 20 65 - WARMEST LOW TEMPERATURE 64 IN 2016
SEP 27 84 - WARMEST HIGH TEMPERATURE 84 IN 2014 /TIED/
SEP 27 72 - WARMEST AVERAGE TEMPERATURE 67 IN 2014 AND OTHERS
OCT 8 62 - WARMEST LOW TEMPERATURE 57 IN 2014
OCT 8 68 - WARMEST AVERAGE TEMPERATURE 68 IN 1947 /TIED/
OCT 9 59 - WARMEST LOW TEMPERATURE 56 IN 1949
OCT 11 61 - WARMEST AVERAGE TEMPERATURE 61 IN 1955 /TIED/
OCT 24 57 - WARMEST LOW TEMPERATURE 55 IN 2001 AND 1959
OCT 25 58 - WARMEST LOW TEMPERATURE 51 IN 1959
OCT 25 62 - WARMEST AVERAGE TEMPERATURE 60 IN 1963
OCT 29 56 - WARMEST LOW TEMPERATURE 53 IN 2015
$$
KIMBLE